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| Nitrogen dissolution and control of molten steel in steelmaking process |
| LI Xiao-ming1, XI Hao-dong1, MIAO De-jun1, LIU Jun-bao2, LÜ Ming1 |
1. School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, Shaanxi, China;
2. Steelmaking Plant, Laiwu Branch of Shandong Iron and Steel Co., Ltd., Jinan 271104, Shandong, China |
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Abstract As a typical coexistence element in steel, the content of nitrogen has an important influence on the properties of steel products. In the process of steelmaking, the nitrogen content in molten steel fluctuates obviously, which leads to unstable properties of finished steel, because the exposed molten steel easily leads to nitrogen increase, or the yield of nitrogen in nitrogen-containing alloy is unstable due to different compositions of molten steel and improper operation. Therefore, the precise control of nitrogen has become a key issue in the production of nitrogen-controlled steel or nitrogen-containing steel. The sources of nitrogen, the thermodynamics and kinetics of nitrogen dissolution in molten steel were analyzed, the changes of nitrogen in molten steel production process, the research status and technical measures of nitrogen control were summarized, and the development direction of precise control of nitrogen in steelmaking process puts forward.
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Received: 12 January 2021
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2021, Vol. 56 
